import random

print('5'+'8')
print("let's go")
string = r'C:\now'
print(string)

print("""
从明天起，做个幸福的人
喂马，劈材，周游世界
从明天起，关心粮食和蔬菜
""")
a = 'helloword'
b = 'password'
print("username",a,"password",b,sep='|')

count = 0
while count != 10:
    print("hello\n")
    count += 1


score = int(random.randint(1,100))
ans = 'A' if score > 90    else 'B' if 80<score<90  else 'C'
print(ans)

for i in "helloworld":
    print(i)

sum = 0
for j in range(100):
    sum += j
print(sum)

for year in range(2018,2100):
    if (year%4==0)and(year%100!=0) or(year%400==0):
        break;
print(year)

for year in range(2018,2100):
    if (year%4==0)and(year%100!=0) or(year%400==0):
        break;
else:
    print('这句话没有显示'+year)